The invention discloses a UV LED line light source curing machine comprising a shell, a heat dissipating device, a plurality of UV LED light source boards and a plurality of convex lens, wherein the heat dissipating device, the UV LED light source boards and the convex lens are fixedly installed in the shell. The front end of the heat dissipating device forms an inwards recessed face. The UV LED light source boards are fixedly installed on the inwards recessed face of the heat dissipating device side by side, and the light emitting axes of the UV LED light source boards are converged to a convergent point. Each convex lens is correspondingly and fixedly installed at the front end of the corresponding UV LED light source board. The light emitting axis of each UV LED light source board coincides with the main optical axis of the corresponding convex lens, and each UV LED light source board is located at the focus of the corresponding convex lens. The multiple UV LED light source boards and the multiple convex lens are arranged inside the UV LED line light source curing machine, the light emitting axes of the UV LED light source boards and the main optical axes of the convex lens are converged to one point, light sources of the UV light source boards are refracted into parallel light through the convex lens and converged, the illumination intensity at the convergent portion is high, and user demands are met.